Study of (p,2p) fission reactions in inverse kinematics using the R3B set-up

¹ IGFAE, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
² Technische Universität Darmstadt, Fachbereich Physik, Institut für Kernphysik, 64289 Darmstadt, Germany
³ IPN Orsay, 15 rue Georges Clemenceau, 91406, Orsay, France
⁴ CEA Saclay, IRFU/DPhN, Centre de Saclay, 91191, Gif-sur-Yvette, France
⁵ CINTECX, Universidade de Vigo, DSN, 36310 Vigo, Spain
⁶ CEA, DAM, DIF, F-91297 Arpajon, France
⁷ GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, D-64291 Darmstadt, Germany
⁸ Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
⁹ Department of Physics, Lund University, P.O. box 118, 221 00 Lund, Sweden
¹⁰ INFN Laboratori Nazionali del Sud, Via Santa Sofia 62, 95123, Catania, Italy
¹¹ LIP and Faculty os Sciences, University of Lisbon, 1000-149 Lisbon, Portugal
¹² RBI Zagreb, Bijenicka cesta 54, HR10000, Zagreb, Croatia
¹³ Technische Universität München, James-Franck-Str 1, 85748, Garching, Germany
¹⁴ Institutionen för Fysik, Chalmers Tekniska Högskola, 412 96 Göteborg, Sweden
¹⁵ Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany
¹⁶ University of Guelph, 50 Stone Road E, N1G 2W1, Guelph, ON, Canada
¹⁷ Institut für Kernphysik der Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
¹⁸ School of Physics, Engineering and Technology, University of York, YO10 5DD York, UK
¹⁹ Institute for Basic Science, Center for Exotic Nuclear Studies, 34126, Daejeon, Republic of Korea
²⁰ Jozef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia

^* e-mail: gabrielgarcia.jimenez@usc.es

Published online: 8 December 2023

Abstract

A new experimental fission approach is presented in the context of the R³B (Reactions with Relativistic Radioactive Beams) collaboration, at the GSI/FAIR facility, in which knockout reactions in inverse kinematics are used to induce fission of ²³⁸U that will allow to characterise the excitation energy of the fission process and all the fission products. The CALIFA (CALorimeter for In-Flight detection of γ-rays and high energy charged pArticles) calorimeter, a key part of the R³B set-up, is used to reconstruct the momenta of the two protons from the (p, 2p) reactions. Preliminary results show that kinematic variables and first estimates for nucleon-removal cross sections are well reconstructed and in good agreement with other experimental measurements.